Heat sink or similar article



FIG. 1 is a perspective view of a heat sink or similar article, showing my new design;

FIG. 2 is an end elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an opposite end elevational view thereof;

FIG. 5 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of a second embodiment of my new design;

FIG. 8 is an end elevational view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is an opposite end elevational view thereof;

FIG. 11 is a side elevational view thereof, the opposite side being a mirror image thereof; and

FIG. 12 is a bottom plan view thereof. 

The ornamental design for a heat sink or similar article, substantially as shown and described. 